SE.de is a PvP server with an extensive economy based on constant resource extraction. As a player you have to collect resources through mining and processing or in battle, to trade them at trading stations towards Limiterium and Space Coins. Only with these you can save new structures (stations and ships) from deletion or buy extra blocks to build more of them.
PvP events also give you access to Nadium and rewards that can be exchanged for valuable special systems.